diff --git a/exec.c b/exec.c
index c99a883..d312bb4 100644
--- a/exec.c
+++ b/exec.c
@@ -1379,7 +1379,7 @@
 
 /* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr
  * but takes a size argument */
-static void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size)
+static void *qemu_ram_ptr_length(ram_addr_t addr, hwaddr *size)
 {
     if (*size == 0) {
         return NULL;